| 摘要 |
PROBLEM TO BE SOLVED: To simply, easily and speedily open/close a light transmitting film by extremely simply and strongly pulling many strings so as to surely fix the light transmitting film to a pole. SOLUTION: This greenhouse consists of the pole 1 curved like an arch and fixed at prescribed intervals, the light transmitting film 2 covering this pole 1, the strings 3 stretched on the upper surface of this film 2 to fix the film 2 on the surface of the pole 1, string fitting rods 4 to which one ends of these strings are combined and a connecting member 6 connecting the rods 4 to the poles 1. The member 6 is provided with slits 11 moving the rods 4 in a pulling direction and screw bars 12 moving the rods 4 inserted to these slits 11 in the pulling direction of the strings. The rods 4 inserted to the slits 11 are moved in the pulling direction of the strings 3 by the screw bars 12 to haul the strings 3 with prescribed tension to stretch-set the film 2. |
